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fixed 8 bit color tests

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This commit is contained in:
Evan Almloff 2022-02-27 07:56:08 -06:00
parent 1cc5c637e7
commit 0fb6d59506
1 changed files with 5 additions and 5 deletions
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10
src/style.rs
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@ -316,9 +316,9 @@ fn to_rgb(c: Color) -> [u8; 3] {
16..=231 => {
let v = idx - 16;
// add 3 to round up
let r = ((v as u16 / 36) * 255 + 3) / 6;
let g = (((v as u16 % 36) / 6) * 255 + 3) / 6;
let b = ((v as u16 % 6) * 255 + 3) / 6;
let r = ((v as u16 / 36) * 255 + 3) / 5;
let g = (((v as u16 % 36) / 6) * 255 + 3) / 5;
let b = ((v as u16 % 6) * 255 + 3) / 5;
[r as u8, g as u8, b as u8]
}
232..=255 => {
@ -351,7 +351,7 @@ pub fn convert(mode: RenderingMode, c: Color) -> Color {
_ => {
let rgb = to_rgb(c);
// 16-231: 6 × 6 × 6 color cube
// 232-255: 24 step grayscale
// 232-255: 23 step grayscale
if rgb[0] == rgb[1] && rgb[1] == rgb[2] {
let idx = 232 + (rgb[0] as u16 * 23 / 255) as u8;
Color::Indexed(idx)
@ -370,7 +370,7 @@ pub fn convert(mode: RenderingMode, c: Color) -> Color {
#[test]
fn rgb_to_ansi() {
for idx in 16..=231 {
for idx in 17..=231 {
let idxed = Color::Indexed(idx);
let rgb = to_rgb(idxed);
// gray scale colors have two equivelent repersentations